A cold-rolled strip steel flattening device

Abstract

The application discloses a cold-rolled strip steel flattening device and relates to the technical field of cold-rolled strip steel processing. The cold-rolled strip steel flattening device comprises a rack, portal frames fixed to the two sides of the rack, a lifting plate arranged between the two portal frames, and a lower roller arranged at the lower end of the rack. Lower bearing seats are rotatably connected to the two ends of the lower roller. The middle lower bearing seat is fixedly connected to the rack, and the remaining lower bearing seats are slidingly connected to the rack along the strip steel conveying direction. The cold-rolled strip steel flattening device only needs to drive the guide frame to lift relative to the lifting plate by the lifting member. The synchronous and equal change of the included angle between each connecting rod and the vertical direction can drive each lower bearing seat to slide along the strip steel conveying direction, the continuous stepless adjustment of the center distance between the two adjacent rollers in the same row can be realized, the machine needs not to be stopped, the bearing seat needs not to be disassembled and reassembled, and the recalibration is not needed. Therefore, the production change and adjustment time are significantly shortened, the labor intensity is reduced, and the operation rate of the machine set is improved.

Description

Technical Field

[0001] This invention relates to the field of cold-rolled strip processing technology, specifically to a cold-rolled strip leveling device. Background Technology

[0002] After being uncoiled and tensioned by uncoiling tension rolls, cold-rolled strip steel generally undergoes a series of processes including leveling, shearing to length, stacking, or rewinding. Among these processes, the leveling process aims to eliminate sheet shape defects such as longitudinal bending, camber, waviness, center wavy, and edge wavy, and to release some residual stress, thus providing a flat sheet surface for subsequent shearing and forming.

[0003] Currently, roller screeds are commonly used for leveling strip steel. Their basic working principle is as follows: the upper and lower working rollers are arranged in an alternating manner (that is, the axis of the upper roller is located in the middle of the two adjacent lower rollers in the same row, which is called roller misalignment or half-pitch misalignment). The strip steel passes back and forth between the upper and lower rollers and is repeatedly subjected to forward and reverse bending. When the surface fiber strain generated by bending exceeds the elastic limit of the material, the surface layer of the strip steel undergoes plastic deformation, thereby straightening the original bent waveform and gradually reducing the amount of reduction, so that the residual curvature and residual stress gradually decrease, and finally a flat plate surface is obtained.

[0004] Due to batch-to-batch and end-to-end variations in strip thickness and hardness, hydraulic drive is typically used on the upper rollers to precisely adjust the interlocking depth e (roll gap) between the upper and lower rollers in order to ensure a consistent leveling effect. In addition, the roll gap p is a pivotal parameter that determines the leveling capability and applicable specifications. The horizontal span between adjacent reverse bending points of the strip is approximately p / 2. Therefore, the smaller p is, the shorter the bending span, the greater the curvature, and the deeper the plastic deformation, which allows for the leveling of thinner strips. The larger p is, the more elastic the strip can bend and spring back, which is mainly used for thicker strips.

[0005] Since the roll diameter usually remains constant, when leveling strips of different specifications, it is often necessary to manually disassemble the rolls and change the position of the roll holders to change the roll gap. This undoubtedly brings inconvenience to production.

[0006] Specifically, in actual use, adjusting the roller gap of existing roller levelers requires stopping the machine, disassembling the roller system, reassembling the bearing housing, and recalibrating. This results in long downtime, high labor intensity, and the adjustment effect is heavily dependent on the operator's experience and skills, affecting the unit's operating rate and capacity. Summary of the Invention

[0007] To address the shortcomings of existing technologies, this invention provides a cold-rolled strip leveling device that solves the problem that existing roller leveling machines require stopping the machine and disassembling the rollers to adjust the roller spacing.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a cold-rolled strip leveling device, comprising a frame with gantry frames fixed on both sides, a lifting plate between the two gantry frames, and a lower roller located at the lower end of the frame, with lower bearing seats rotatably connected to both ends. The middle lower bearing seat is fixedly connected to the frame, while the remaining lower bearing seats are slidably connected to the frame along the strip conveying direction. An upper roller is located above the lower roller and is mounted on the lower end of the lifting plate via an upper bearing seat, which is slidably connected to the lifting plate along the strip conveying direction. The upper and lower rollers are staggered along the strip conveying direction, with the upper roller located between two adjacent lower rollers. The movable hinge seat is vertically slidably installed on the outside of the lower bearing seat. A connecting rod is rotatably connected between the movable hinge seat and the nearest upper bearing seat, and two adjacent connecting rods form a zigzag linkage structure. The guide frame is vertically slidably connected to the outside of the frame, and the end of each movable hinge seat away from the lower bearing seat is slidably connected to the guide frame. The first hydraulic cylinder is fixed on the gantry frame, and its telescopic end is connected to the lifting plate. It is used to drive the lifting plate to rise and fall, and to drive the guide frame to rise and fall synchronously with the lifting plate, so as to adjust the roll gap pressure. The lifting component is set on the lifting plate and connected to the guide frame. It is used to drive the guide frame to rise and fall relative to the lifting plate, so as to adjust the center distance between two adjacent rollers in the same row.

[0009] Furthermore, there are n lower rollers, where n is an odd number and n≥3, and there are n-1 upper rollers.

[0010] Furthermore, the lifting component includes a second hydraulic cylinder fixed to the lifting plate, and the telescopic end of the second hydraulic cylinder is fixedly connected to the middle part of the guide frame; A connecting frame is slidably connected to the outer side of the frame along the vertical direction. A guide rod is fixedly connected between the connecting frame and the lifting plate. The two ends of the guide frame are slidably connected to the corresponding guide rods.

[0011] Furthermore, a first spring is sleeved on the outer side of the guide rod between the guide frame and the lifting plate, and the first spring is always in a compressed state.

[0012] Furthermore, the frame has a first slide groove on both sides along the strip conveying direction, the middle lower bearing seat is fixed in the first slide groove, the remaining lower bearing seats slide along the first slide groove, and the bottom of the remaining lower bearing seats is provided with balls.

[0013] Furthermore, a second sliding groove is provided vertically on the outer side of the lower bearing seat, and one end of the movable hinge seat is slidably disposed in the second sliding groove.

[0014] Furthermore, a guide shaft extending along the strip conveying direction is rotatably mounted at the lower end of the gantry frame, and a sliding worm is slidably mounted on the guide shaft; a worm wheel is coaxially fixed at one end of the lower roller, the worm wheel meshes with the sliding worm, and when the lower bearing seat slides along the strip conveying direction, the sliding worm slides along the guide shaft and maintains meshing with the worm wheel.

[0015] Furthermore, the guide shaft has a prism structure, with the sliding worm gear in the middle fixed on the guide shaft. The remaining sliding worm gears are provided with sliding holes that are compatible with the guide shaft, so that the remaining sliding worm gears slide along the guide shaft with the corresponding lower bearing seat and rotate synchronously with the guide shaft. A motor for driving the rotation of the guide shaft is fixed on the outside of the gantry.

[0016] Furthermore, the outer diameter of the worm gear is smaller than the outer diameter of the lower roller.

[0017] Furthermore, the system includes a controller and a position detection element. The position detection element is used to detect the position of the lower bearing seat along the strip conveying direction. The controller is electrically connected to the first hydraulic cylinder, the lifting component, and the position detection element to control the first hydraulic cylinder to drive the lifting plate and the guide frame to rise and fall synchronously, thereby adjusting the roll gap pressure. The controller also controls the lifting component to drive the guide frame to rise and fall relative to the lifting plate, and determines the adjustment amount of the center distance between two adjacent rollers in the same row based on the detection signal from the position detection element, so as to adjust the center distance between two adjacent rollers in the same row without changing the roll gap pressure.

[0018] The present invention has the following beneficial effects: (1) The cold-rolled strip leveling device uses the middle lower bearing seat as a fixed position reference, and the remaining lower bearing seats slide along the strip conveying direction. The movable hinge seat on the lower bearing seat is rotatably connected to the upper bearing seat by the connecting rod. The two adjacent connecting rods form a zigzag linkage structure. The ends of each movable hinge seat away from the lower bearing seat are uniformly slidably connected in the same guide frame. Therefore, the guide frame only needs to be driven to rise and fall relative to the lifting plate by the lifting component. The lower bearing seats can slide equally along the strip conveying direction by the synchronous and equal change of the angle between each connecting rod and the vertical direction. This achieves continuous stepless adjustment of the center distance between two adjacent rollers in the same row. There is no need to stop the machine to disassemble the rollers, reassemble the bearing seats and recalibrate. This significantly shortens the changeover and adjustment time, reduces labor intensity and improves the unit's operating rate.

[0019] (2) The cold-rolled strip leveling device drives the lifting plate to rise and fall through the first hydraulic cylinder, and the lifting plate drives the guide frame to rise and fall synchronously. The vertical distance between the guide frame and the lifting plate remains unchanged during the adjustment of the roll gap. Therefore, the included angle and horizontal projection length of each connecting rod remain unchanged, and the roll gap is not affected. When the lifting component drives the guide frame to rise and fall relative to the lifting plate to adjust the roll gap, the height of the lifting plate and the upper roll remains unchanged, the height of the lower roll remains unchanged, and the roll gap is not affected. Thus, the roll gap adjustment and the roll gap adjustment are independent of each other and do not interfere with each other.

[0020] (3) The cold-rolled strip leveling device is constrained by the same guide frame through each movable hinge seat, and the horizontal projection length of each connecting rod is always equal. Therefore, during the roll gap adjustment process, each roll moves synchronously and at equal distances. The upper roll is always located in the middle of the two adjacent lower rolls. That is, the equal roll gap and the misalignment relationship between the rolls are automatically maintained. There is no need to remeasure and calibrate after each adjustment, which avoids new plate shape defects such as bow shape and single-sided wave caused by inadequate calibration. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 In this invention Figure 1 Side view; Figure 3 This is a diagram showing the positional relationship between the upper and lower rollers in this invention; Figure 4 This is a schematic diagram of the installation structure of the connecting rod in this invention; Figure 5 This is a schematic diagram of the installation structure of the guide frame in this invention; Figure 6 This is a schematic diagram of the mounting structure of the upper roller in this invention; Figure 7 This is a schematic diagram of the connection structure between the upper bearing housing and the lower bearing housing in this invention; Figure 8 This is a schematic diagram of the driving structure of the lower roller in this invention; Figure 9 In this invention Figure 8 The main view; Figure 10 This is a schematic diagram of the installation structure of the sliding worm gear in this invention.

[0022] In the diagram, 1. Frame; 2. Gantry frame; 3. First chute; 4. Lifting plate; 5. Upper roller; 6. Lower roller; 7. First hydraulic cylinder; 8. Upper bearing seat; 9. Lower bearing seat; 10. Connecting rod; 11. Movable hinge seat; 12. Guide frame; 13. Guide rod; 14. Connecting frame; 15. Second hydraulic cylinder; 16. First spring; 17. Second chute; 18. Worm gear; 19. Motor; 20. Guide shaft; 21. Sliding worm; 22. Position detection element. Detailed Implementation

[0023] The following is based on Figure 1 - Figure 10 This invention describes a cold-rolled strip leveling device provided in an embodiment of the present invention.

[0024] Please see Figure 1 - Figure 10 The present invention provides a technical solution: a cold-rolled strip steel leveling device, including a frame 1, gantry frames 2 fixed on both sides of the frame 1, and a lifting plate 4 between the two gantry frames 2. The lifting plate 4 is driven by a first hydraulic cylinder 7 fixed on the gantry frame 2 and can be raised and lowered vertically.

[0025] The cold-rolled strip leveling device provided in this embodiment also includes a lower roller 6 and an upper roller 5. The lower roller 6 is located at the lower end of the frame 1, and both ends of it are rotatably connected to lower bearing seats 9. The middle lower bearing seat 9 is fixedly connected to the frame 1 to serve as the position reference for each roller. The remaining lower bearing seats 9 are slidably connected to the frame 1 along the strip conveying direction, so that they can slide back and forth in the strip conveying direction to adjust the distance between two adjacent lower rollers 6. The upper roller 5 is located above the lower roller 6. The upper roller 5 is installed at the lower end of the lifting plate 4 through an upper bearing seat 8, and the upper bearing seat 8 is slidably connected to the lifting plate 4 along the strip conveying direction. Specifically, the upper bearing seat 8 and the lifting plate 4 can be slidably connected through a T-shaped groove and a T-shaped slider to allow the upper roller 5 to slide in the strip conveying direction. To perform the corresponding translational motion, the upper bearing seat 8 needs to meet the requirements of stability and guidance. The position adjustment of the upper bearing seat 8 is generally done before the cold-rolled strip is leveled. Therefore, rolling friction between the T-shaped chute and the T-shaped slider can be disregarded to improve the stability of the upper bearing seat 8. The upper roller 5 and the lower roller 6 are arranged alternately along the strip conveying direction, and the upper roller 5 is located between two adjacent lower rollers 6. That is, the roller axis of the upper roller 5 is located in the middle position of the roller axis of two adjacent lower rollers 6 in the same row, thus forming the roller misalignment arrangement necessary for roller leveling. When the strip passes between the upper and lower rollers, it is repeatedly subjected to forward and reverse bending. When the surface fiber strain generated by bending exceeds the elastic limit of the material, the surface layer of the strip undergoes plastic deformation, thereby straightening the original bent waveform and achieving leveling.

[0026] It should be noted that in this embodiment, the upper roller 5 is a passive roller, driven by the friction between the strip and the roller surface. In order to make the distance between each roller equal and to ensure the symmetry and stability of the structure, there are n lower rollers 6, where n is an odd number and n≥3, and there are n-1 upper rollers 5. This makes the number of lower rollers 6 on both sides of the lower bearing seat 9 in the middle equal. The fixed position of the middle lower bearing seat 9 can be used as a symmetry reference for the synchronous movement of the roller seats on both sides. Preferably, 3≤n≤9. For example, when n=3, there are 3 lower rollers 6 and 2 upper rollers 5. In addition, the larger n is, the better the strip leveling effect.

[0027] like Figures 1-7 As shown, to achieve the adjustment of the roll gap, the cold-rolled strip leveling device provided in this embodiment also includes a movable hinge seat 11, a connecting rod 10, and a guide frame 12. A second sliding groove 17 is provided vertically on the outer side of the lower bearing seat 9. One end of the movable hinge seat 11 is slidably installed in the second sliding groove 17, that is, the movable hinge seat 11 is slidably installed vertically on the outer side of the lower bearing seat 9. The movable hinge seat 11 is rotatably connected to the nearest upper bearing seat 8 by a connecting rod 10. In other words, the two connecting rods located on both sides of the same upper bearing seat 8 are connected by a connecting rod 10. The connecting rods 10 are respectively connected to the movable hinge seats 11 on the adjacent lower bearing seats 9 on both sides of the upper bearing seat 8. The connecting rods 10 are connected end to end in sequence, thus forming a zigzag linkage structure that extends sequentially along the strip conveying direction. The movable hinge seats 11 at both ends are single hinge seats, while the remaining movable hinge seats 11 are double hinge seats, so as to facilitate hinge connection with the connecting rods 10. In addition, the guide frame 12 is slidably connected to the outside of the frame 1 vertically. The end of each movable hinge seat 11 away from the lower bearing seat 9 is horizontally connected. The connecting rods 10 are slidably connected to the guide frame 12, so that all the movable hinge seats 11 are uniformly constrained by the same guide frame 12 and are at the same height. It should be noted that the lengths of the connecting rods 10 provided in this embodiment are equal, and the movable hinge seats 11 are kept at the same height by the same guide frame 12. The upper bearing seats 8 are installed on the same lifting plate 4, and the angle between each connecting rod 10 and the vertical direction is always consistent. Thus, the angle between two adjacent connecting rods 10 changes synchronously and equally with the lifting and lowering of the guide frame 12. Therefore, during the roller gap adjustment process, each roller moves synchronously and at equal distances. The upper roller 5 is always located in the center of the two adjacent lower rollers 6. That is, the equal roller gap and the misalignment relationship between the rollers are automatically maintained. There is no need to remeasure and calibrate after each adjustment, avoiding new plate shape defects such as bow shape and single-sided wave caused by inadequate calibration. It should be noted that the angle between the connecting rod 10 and the vertical direction is kept in the range of 15° to 60° to prevent the risk of jamming and sudden change in shape when the angle between the connecting rod 10 and the vertical direction approaches 90° or 0°.

[0028] like Figure 1 , Figure 2 , Figure 4 and Figure 6As shown, in this embodiment, the lifting component for adjusting the roller gap includes a second hydraulic cylinder 15 fixed on the lifting plate 4. The telescopic end of the second hydraulic cylinder 15 is fixedly connected to the middle of the guide frame 12. A connecting frame 14 is slidably connected to the outer side of the frame 1 in a vertical direction. A guide rod 13 is fixedly connected between the connecting frame 14 and the lifting plate 4. The two ends of the guide frame 12 are slidably connected to the corresponding guide rods 13. Thus, the connecting frame 14, the guide rods 13, and the lifting plate 4 form a frame that rises and falls together with the lifting plate 4. The guide frame 12 rises and falls relative to the lifting plate 4 along the guide rods 13 under the drive of the second hydraulic cylinder 15, thereby changing the vertical distance between the guide frame 12 and the lifting plate 4. At the same time, since the two ends of the guide frame 12 are guided by the guide rods 13 located on both sides of the frame 1, the two ends of the guide frame 12 are synchronized during the lifting process, and the operating side and the transmission side are consistent. The roller axis is not easily skewed, which is beneficial to suppress strip deviation and uneven transverse shape.

[0029] A first spring 16 is sleeved on the outside of the guide rod 13 between the guide frame 12 and the lifting plate 4. The first spring 16 is always in a compressed state, with one end abutting against the lifting plate 4 and the other end abutting against the guide frame 12, so that the guide frame 12 and the lifting plate 4 are always pre-tightened, thereby eliminating the idle stroke and transmission gap between the piston rod of the second hydraulic cylinder 15 and the guide frame 12, and making the lifting of the guide frame 12 more stable, the roller gap setting more accurate, and the running position more stable.

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, in this embodiment, the first hydraulic cylinder 7, used to adjust the roll gap pressure, is fixed on the gantry 2. Its telescopic end is connected to the lifting plate 4, which is used to drive the lifting plate 4 to rise and fall, and drive the guide frame 12 to rise and fall synchronously with the lifting plate 4. Since the guide frame 12 rises and falls along the guide rod 13 as a whole, the vertical distance between the guide frame 12 and the lifting plate 4 remains unchanged during the roll gap adjustment process. The angle between each connecting rod 10 and the vertical direction and the horizontal projection length remain unchanged. Therefore, the roll gap is not affected by the roll gap adjustment. Only the vertical distance between the upper roller 5 and the lower roller 6 changes, that is, the roll gap pressure is independently adjusted. Similarly, when the second hydraulic cylinder 15 drives the guide frame 12 to rise and fall relative to the lifting plate 4 to adjust the roll gap, the height of the lifting plate 4 and the upper roller 5 remains unchanged, the height of the lower roller 6 remains unchanged, and the roll gap is not affected. Thus, the roll gap adjustment and the roll gap adjustment are independent of each other and do not interfere with each other.

[0031] like Figure 5 , Figure 7 and Figure 10As shown, considering that the lower bearing seat 9 needs to slide along the strip conveying direction when adjusting the roller gap, this embodiment has a first slide groove 3 on both sides of the frame 1 along the strip conveying direction. The lower bearing seat 9 located in the middle is fixed in the first slide groove 3, and the remaining lower bearing seats 9 slide along the first slide groove 3. The bottom of the remaining lower bearing seats 9 is provided with balls to reduce the frictional resistance when the lower bearing seats 9 slide along the first slide groove 3, making the roller gap adjustment easy and reliable. In addition, the second slide groove 17 set vertically on the outer side of the lower bearing seat 9 slides in cooperation with one end of the movable hinge seat 11, which not only provides vertical guidance for the movable hinge seat 11, but also compensates for the vertical displacement between the movable hinge seat 11 and the lower bearing seat 9 when the movable hinge seat 11 rises and falls with the guide frame 12, ensuring that the rotation of the connecting rod 10 is not hindered.

[0032] like Figures 8-10 As shown, to solve the problem of the roller system transmission being difficult to adapt after the roller gap is changed, this embodiment has a guide shaft 20 extending along the strip conveying direction rotatably installed at the lower end of the gantry 2. A sliding worm 21 is slidably installed on the guide shaft 20. A worm wheel 18 is coaxially fixed at one end of the lower roller 6. The worm wheel 18 meshes with the sliding worm 21. Therefore, the sliding worm 21 can drive the worm wheel 18 and the lower roller 6 to rotate, so that the lower roller 6 acts as the active roller to provide conveying traction for the strip. Furthermore, when the lower bearing seat 9 slides along the strip conveying direction, the sliding worm 21 slides along the guide shaft 20 and maintains meshing with the worm wheel 18, so that the adjustment of the roller gap and the continuous operation of the transmission do not interfere with each other.

[0033] Specifically, the guide shaft 20 has a prism structure, and the sliding worm 21 located in the middle is fixed on the guide shaft 20. The remaining sliding worms 21 are provided with sliding holes that are compatible with the guide shaft 20, so that the remaining sliding worms 21 slide along the guide shaft 20 with the corresponding lower bearing seat 9 and rotate synchronously with the guide shaft 20. A motor 19 for driving the guide shaft 20 to rotate is fixed on the outside of the gantry frame 2.

[0034] During operation, the motor 19 drives the guide shaft 20 to rotate. The guide shaft 20 drives each sliding worm 21 to rotate synchronously through the cooperation of the prism and the sliding hole. Each sliding worm 21 then drives the corresponding worm wheel 18 and the lower roller 6 to rotate synchronously. When the lower bearing seat 9 corresponding to a certain sliding worm 21 slides along the strip conveying direction due to the adjustment of the roller gap, the sliding worm 21 slides synchronously along the guide shaft 20. Its meshing relationship with the worm wheel 18 remains unchanged, so it can reliably transmit torque even when the roller gap changes arbitrarily. This avoids the problems of re-connection of transmission components, increased gap, and easy vibration and noise caused by the roller gap change in the traditional structure. Since the sliding worm 21 located in the middle corresponds to the fixed middle lower bearing seat 9, it does not need to slide. Therefore, it is fixed on the guide shaft 20 to simplify the structure and serve as the basis for axial positioning. In addition, a second spring can be installed between the movable sliding worm 21 and the adjacent component to improve the stability of the sliding worm 21 when it is moving.

[0035] like Figure 9 As shown, to avoid interference between the worm gear 18 and the adjacent lower bearing seat 9, upper bearing seat 8 and adjacent roller ends when the roller seat slides, the outer diameter of the worm gear 18 is smaller than the outer diameter of the lower roller 6.

[0036] like Figure 4 and Figure 9 As shown, to achieve automatic and precise adjustment of roll gap and roll spacing, the cold-rolled strip leveling device provided in this embodiment also includes a controller and a position detection element 22. The position detection element 22 is used to detect the position of the lower bearing seat 9 along the strip conveying direction. It can be a displacement sensor, magnetic grating ruler, or optical grating ruler, etc. The controller is electrically connected to the first hydraulic cylinder 7, the lifting component, and the position detection element 22. On the one hand, it controls the first hydraulic cylinder 7 to drive the lifting plate 4 and the guide frame 12 to rise and fall synchronously to adjust the roll gap pressure. On the other hand, it controls the lifting component to drive the guide frame 12 to rise and fall relative to the lifting plate 4. Based on the detection signal of the position detection element 22, it determines the adjustment amount of the center distance between two adjacent rolls in the same row. Thus, the center distance between two adjacent rolls in the same row is adjusted without changing the roll gap pressure. The controller can perform conversion and closed-loop control based on the above relationship and the feedback signal of the position detection element 22 to ensure the setting accuracy and repeatability of the roll gap.

[0037] During use (operation), the target roll gap is first determined based on the strip thickness, hardness, and wavelength of the strip shape defects to be eliminated. The second hydraulic cylinder 15 is then activated, causing its telescopic end to drive the guide frame 12 to rise and fall relative to the lifting plate 4 along the guide rod 13. Each movable hinge seat 11 rises and falls accordingly, thereby synchronously changing the angle between each connecting rod 10 and the vertical direction, as well as its horizontal projection length. This further drives each lower bearing seat 9 to slide synchronously and equally along the first sliding groove 3. At the same time, the upper roller 5 also moves synchronously between the two adjacent lower rollers 6 along with the upper bearing seat 8. When the position of the lower bearing seat 9 detected by the position detection element 22 reaches the position corresponding to the target roll gap, the controller controls the second hydraulic cylinder 15 to stop. At this time, the center distance between two adjacent rollers in the same row is equal, and the upper roller 5 is exactly located in the center of the two adjacent lower rollers 6, thus completing the roll gap setting.

[0038] Subsequently, based on the incoming material thickness and the target reduction amount, the first hydraulic cylinder 7 is activated, driving the lifting plate 4, along with the guide frame 12, connecting frame 14, guide rod 13, and upper roller 5, to rise and fall synchronously as a whole, so that the vertical distance between the upper roller 5 and the lower roller 6 reaches the set value, thus completing the setting of the roll gap reduction amount. During this process, the vertical distance between the guide frame 12 and the lifting plate 4 remains unchanged, and the roll gap remains constant. After the strip is uncoiled by the uncoiler and tensioned by the uncoiling tension roller, it enters between the upper roller 5 and the lower roller 6. Under the repeated forward and reverse bending action of the upper and lower rollers, surface plastic deformation occurs, thereby eliminating strip shape defects such as longitudinal bending, sickle bend, flare, center waviness, and edge waviness. At the same time, the motor 19 drives each lower roller 6 to rotate synchronously via the guide shaft 20, sliding worm gear 21, and worm wheel 18, providing stable conveying traction for the strip.

Claims

1. A cold-rolled strip leveling device, comprising a frame (1) with gantry frames (2) fixed on both sides thereon, and a lifting plate (4) provided between the two gantry frames (2), characterized in that, Also includes: The lower roller (6) is located at the lower end of the frame (1), and both ends of it are rotatably connected to the lower bearing seat (9). The lower bearing seat (9) located in the middle is fixedly connected to the frame (1), and the other lower bearing seats (9) are slidably connected to the frame (1) along the strip conveying direction. The upper roller (5) is located above the lower roller (6) and is installed at the lower end of the lifting plate (4) through the upper bearing seat (8). The upper bearing seat (8) is slidably connected to the lifting plate (4) along the strip conveying direction. The upper roller (5) and the lower roller (6) are arranged alternately along the strip conveying direction, and the upper roller (5) is located between two adjacent lower rollers (6). The movable hinge (11) is slidably installed on the outside of the lower bearing seat (9) along the vertical direction. The movable hinge (11) is rotatably connected to the nearest upper bearing seat (8) by a connecting rod (10). Two adjacent connecting rods (10) form a zigzag linkage structure. The guide frame (12) is slidably connected to the outside of the frame (1) in a vertical direction, and the end of each movable hinge (11) away from the lower bearing seat (9) is slidably connected to the inside of the guide frame (12); The first hydraulic cylinder (7) is fixed on the gantry (2), and its telescopic end is connected to the lifting plate (4) to drive the lifting plate (4) to rise and fall, and drive the guide frame (12) to rise and fall synchronously with the lifting plate (4) to adjust the roll gap pressure. The lifting component is located on the lifting plate (4) and connected to the guide frame (12). It is used to drive the guide frame (12) to lift relative to the lifting plate (4) so ​​as to adjust the center distance between two adjacent rollers in the same row.

2. The cold-rolled strip leveling device according to claim 1, characterized in that, There are n lower rollers (6), where n is an odd number and n≥3, and there are n-1 upper rollers (5).

3. The cold-rolled strip leveling device according to claim 2, characterized in that, The lifting component includes a second hydraulic cylinder (15) fixed on the lifting plate (4), and the telescopic end of the second hydraulic cylinder (15) is fixedly connected to the middle part of the guide frame (12); A connecting frame (14) is slidably connected to the outer side of the frame (1) in a vertical direction. A guide rod (13) is fixedly connected between the connecting frame (14) and the lifting plate (4). The two ends of the guide frame (12) are slidably connected to the corresponding guide rod (13).

4. A cold-rolled strip leveling device according to claim 3, characterized in that, A first spring (16) is sleeved on the outside of the guide rod (13) between the guide frame (12) and the lifting plate (4), and the first spring (16) is always in a compressed state.

5. A cold-rolled strip leveling device according to claim 4, characterized in that, The frame (1) has a first slide groove (3) on both sides along the strip conveying direction. The lower bearing seat (9) in the middle is fixed in the first slide groove (3). The remaining lower bearing seats (9) slide along the first slide groove (3), and the bottom of the remaining lower bearing seats (9) is provided with balls.

6. A cold-rolled strip leveling device according to claim 5, characterized in that, The lower bearing seat (9) has a second sliding groove (17) on its outer side along the vertical direction, and one end of the movable hinge seat (11) is slidably disposed in the second sliding groove (17).

7. A cold-rolled strip leveling device according to any one of claims 1-6, characterized in that, The lower end of the gantry (2) is rotatably mounted with a guide shaft (20) extending along the strip conveying direction, and a sliding worm (21) is slidably mounted on the guide shaft (20); one end of the lower roller (6) is coaxially fixed with a worm wheel (18), the worm wheel (18) meshes with the sliding worm (21), and when the lower bearing seat (9) slides along the strip conveying direction, the sliding worm (21) slides along the guide shaft (20) and maintains meshing with the worm wheel (18).

8. A cold-rolled strip leveling device according to claim 7, characterized in that, The guide shaft (20) has a prism structure. The sliding worm (21) in the middle is fixed on the guide shaft (20). The remaining sliding worms (21) are provided with sliding holes that are compatible with the guide shaft (20), so that the remaining sliding worms (21) slide along the guide shaft (20) with the corresponding lower bearing seat (9) and rotate synchronously with the guide shaft (20). The outside of the gantry (2) is fixed with a motor (19) for driving the guide shaft (20) to rotate.

9. A cold-rolled strip leveling device according to claim 8, characterized in that, The outer diameter of the worm gear (18) is smaller than the outer diameter of the lower roller (6).

10. A cold-rolled strip leveling device according to claim 9, characterized in that, Includes a controller and a position detection element (22), the position detection element (22) being used to detect the position of the lower bearing housing (9) along the strip conveying direction; The controller is electrically connected to the first hydraulic cylinder (7), the lifting component, and the position detection element (22) to control the first hydraulic cylinder (7) to drive the lifting plate (4) and the guide frame (12) to rise and fall synchronously, and to adjust the roll gap pressure. The control lifting component drives the guide frame (12) to rise and fall relative to the lifting plate (4), and determines the adjustment amount of the center distance between two adjacent rollers in the same row according to the detection signal of the position detection element (22), so as to adjust the center distance between two adjacent rollers in the same row without changing the roller gap pressure.

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